DART Rate Calculator

The DART (Days Away, Restricted, or Transferred) rate is a critical workplace safety metric mandated by the Occupational Safety and Health Administration (OSHA). It quantifies the frequency of severe recordable injuries and illnesses relative to the total hours worked by the workforce. Calculating this metric accurately is essential for organizational risk assessment. A high DART rate signals significant operational hazards, directly impacting workers' compensation insurance premiums and increasing the probability of targeted OSHA inspections.

This tool utilizes the standardized OSHA formula, multiplying the total qualifying incidents by the base constant 200,000 (representing 100 full-time equivalent employees working 40 hours per week for 50 weeks). The result is then divided by the actual total hours worked by all employees during the reference period. Relying on precise data entry is paramount; underestimating total hours or misclassifying incidents will skew the resulting rate, potentially triggering unwarranted compliance audits or obscuring legitimate safety deficiencies.

The calculation strictly follows the OSHA standard formula for recordable incident rates. The base multiplier normalizes the data to a standard metric of 100 employees, allowing for standardized comparison across organizations of vastly different sizes.

Where:
I = Total number of incidents resulting in Days Away, Restriction, or Transfer.
H = Total number of hours worked by all employees during the defined calendar year.
200,000 = Base equivalent of 100 full-time workers.